2171203230 has 96 divisors (see below), whose sum is σ = 6144984864. Its totient is φ = 489452544.

The previous prime is 2171203189. The next prime is 2171203249. The reversal of 2171203230 is 323021712.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 2171203197 and 2171203206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 97194 + ... + 117426.

It is an arithmetic number, because the mean of its divisors is an integer number (64010259).

Almost surely, 2^2171203230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2171203230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3072492432).

2171203230 is an abundant number, since it is smaller than the sum of its proper divisors (3973781634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2171203230 is a wasteful number, since it uses less digits than its factorization.

2171203230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20330 (or 20323 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 2171203230 is about 46596.1718384676. The cubic root of 2171203230 is about 1294.8918341602.

Adding to 2171203230 its reverse (323021712), we get a palindrome (2494224942).

The spelling of 2171203230 in words is "two billion, one hundred seventy-one million, two hundred three thousand, two hundred thirty".